Die-stock.



v H. w. OSTER.

v DIE STOCK. 991 1110911011 1 11,1111 11111.21, 1911.

Patented Nov. 19, 1912.

HERMAN W. OSTEB, 0F CLEVELAND, OHIO, ASSIGNOR TO THE OSTER MANUFACTURINGCOMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

DIE-STOCK.

Specification of Letters Patent.

Patented Nov. 19, 1912.

Application filed January 27, 1911. Serial No. 604,947.

To all whom it may concern:

Be it known that I, HERMAN W. OSTER, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Die-Stocks, of whichthe following is a full, clear, and exact description.

This invention is an improvement on the mechanism which forms thesubject matter of the Oster Patent No. 977,541, granted December 6,1910. The tool shown in that patent is open to criticism for tworeasons, viz: (1) There are no means provided therein to prevent theeccentric from accidentally turning in the slot in the cam plate ear;and, as a matter of fact, it does sometimes turn while the tool is beinghandled, and thereby the cam plate and dies are moved from the positionin which it is desired to hold them; (2) chips and other foreignparticles may get into the slot in the ear of the cam plate and therebyprevent the operation, or, at least, the accurate operation of said camplate. It is to correct these two defects that the present invention isdesigned.

In the drawing, Figure 1 is an end view of a die stock in which theinvention is embodied. Fig. 2 is a longitudinal section through thatside of the die stock which carries the novel features of the invention.Fig. 3 is an end view of the parts shown in Fig. 2, with the flange onthe eccentric cut away, but indicated by dotted lines. Fig. 4 is asectional view on line tof Fig. 1.

Referring to the parts by letters, A represents the stock which carriesradially movable cutters or chasers B, B, and on which ismounted a camplate D for causing the simultaneous inward or outward movement of thecutters or chasers. Projecting laterally from the die stock is a shortflange a, in which is an arcual slot a. A stud E is adjustably securedin this slot and extends out through an ellipsoidal slotd in an ear clon the cam plate; and an eccentric G rotatably mounted on said stud liesalso in this ellipsoidal slot. In the respects specitied theconstruction shown in the drawing is generically like that which formsthe subject matter of the above mentioned patent. The eccentric G,however, is provided at its outer end with a flanged head 9, thediameter of which is such that it will cover the ellipsoidal slot (Zunder all conditions. The length of the eccentric is substantially equalto the thickness of the ear d in which it lies, wherefore this flangewill bear lightly against the outer face of said ear. A clamping memberF bears against the inner face of said ear; and the end of said memberwhich does so bear is of such size that it also covers the ellipsoidalslot under all conditions. One side of this clamping member is cut awayfollowing the contour of the external wall of the stock, so that thisclamping member will be prevented from turning by engaging with thestock. The stud E is a long screw, the head e of which sets into acountersunk hole in the outer end of the eccentric. This head and thepart of the screw passing through the eccentric is unthreaded. Behindthis unthreaded portion is a threaded shank e of reduced diameter, whichscrews through the clamping member, and then passes loosely through thearcual slot a and has screwed onto its end a clamping nut H providedwith a convenient operating handle it. A washer J lies between this nutand the under face of the flange. The parts are so proportioned thatwhen, by turning the nut, the washer and the clamping member are causedto bind tightly against the flange, the outer face of the clampingmember will engage lightly with the under face of the ear, and the underface of the flange of the eccentric will engage lightly with the outerface of said car. For convenience an operating handle 03 is formed onthe flanged eccentric.

In order to adjust the device for use, the nut H is loosened, and thescrew stud E and the parts carried thereby are moved along the arcualslot to the proper position, and the eccentric is turned a trifle pastthe cutter so that the cam plat-e adjuster will hold the cutters in asfar as they will go, and will effectually resist their tendency to moveoutward as the result of the out-thrust of the work on the cutters. Whenthe cutters have been properly adjusted, the nut H is tightened, and thedevice is ready for use. When the thread has been cut on the work, theoperator taking hold of the handle d of the eccentric will swing itaround, and this will move the cam plate adjuster in the direction towithdraw the cutters far enough to clear the work.

In the eccentric is a spring actuated plunger M, specifically in theform of a ball; and

.in the outer face of the clamping member F Having described myinvention, I claimzj 1. The combination of a die stock carrying cutters,and having a laterally extended flange in which is an arcual slot, a camplate adjuster mounted on the die stock for adjusting the cutters, saidadjuster having a laterally extended ear in which is a slot, a screwstud passing through the arcual slot in the flange on the die stock andhaving an unthreaded portion which passes also through the slot in thecam plate ear, a nonrotatable clamping memberupon the screw stud lyingand fitting between the flange on the die stock and the ear on the camplate, the outer face of said clamping member being of such size as tocompletely cover the slot in the ear of the cam plate, a clamping nutscrewing onto the lower end of said stud, and an eccentric rotatablymounted on the unthreaded part of the screw stud and lying in the slotin the ear of the cam plate, and having a flanged head arranged toengage the outer face of said ear, said flanged head being of such sizeas to completely cover the slot therein.

2. The combination of a die stock carrying movable cutters and having alaterally extended flange, a cam plate adjuster mounted on the die stockin engagement with the cutters for adjusting them, said adjuster havinga laterally extended ear in which is a slot, a stud fixed to said flangeand passing through the slot in said ear, an eccentric rotatably mountedupon said stud and lying in said slot, a non-rotatable member F carriedby the stud and lying between said flange and ear, one of the lastmentioned parts having in that face which is adjacent to the other parttwo spot holes, and the other member carrying a spring plunger forengagement in said spot holes. v

3. The combination of a die stock carrying movable cutters and having alaterally extended flange in which is an arcual slot, a cam plateadjuster mounted 011 the die stock in engagement with the cutters foradjusting them, said adjuster having a laterally ex tended ear in whichis a slot, a stud having a threaded portion which passes through saidarcual slot, a non-rotatable clamping member embracing the stud andlying between the flange in which said arcual slot is formed and the earof the cam plate, a nut screwing onto the threaded end of the studwhereby said flange may be clamped between said nut and clamping member,an eccentric rotatably mounted upon said stud and lying in the slot insaid ear, one end of said eccentric lying close to the end of saidclamping member, a spring plunger carried by one of the last twomentioned members, and the other member having in its face two spotholes for the reception ofsaid plunger.

In testimony whereof, I hereunto aflix my signature in the presence oftwo witnesses.

HERMAN WV. OSTER, Witnesses:

R. B. TEWKSBURY, H. R. SULLIVAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

